7639226604domain: NAppears in sequencesNumber of (n+1)X(2+1) 0..4 arrays with every 2X2 subblock summing to a prime.at n=5A251509Number of (n+1)X(6+1) 0..4 arrays with every 2X2 subblock summing to a prime.at n=1A251513T(n,k)=Number of (n+1)X(k+1) 0..4 arrays with every 2X2 subblock summing to a prime.at n=22A251515